<!DOCTYPE html>
<html lang="zh-CN">

<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>主页</title>
  <style>
    body {
      background-color: orange;
    }
  </style>
</head>

<body>
  <div></div>
</body>

</html>